Self-locking removable sash window installation



Oct. 21, 1969 F. c. OSTEN, SR

SELF-LOCKING REMOVABLE SASH WINDOW INSTALLATION 3 Sheets-Sheet 1Original Filed March 9, 1966 FRED C-OSTEN, SR.

AT ORNEYS 1969 F. c. OSTEN, SR

SELF-LOCKING REMOVABLE SASH WINDOW INSTALLATION 3 Sheets-Sheet 2Original Filed March 9, 1966 INVENTOR ATTORNEY Oct. 21, 1969 F, c.OSTEN, sR

SELF-LOCKING REMOVABLE SASH WINDOW INSTALLATION 3 Sheets-Sheet OriginalFiled March 9, 1966 INVENTOR FRED c OSTEN, SR-

EWY'

ATTO NEYS 3,473,263 SELF-LOCKING REMOVABLE SASH WINDOW INSTALLATION FredC. Osten, Sr., 14500 Abington Ave., Detroit, Mich. 48227 Originalapplication Mar. 9, 1966, Ser. No. 533,044, new Patent No. 3,375,611,dated Apr. 2, 1968. Divided and this application Mar. 25, 1968, Ser. No.739,997

Int. Cl. Ed /18, 13/12 US. Cl. 49-161 3 Claims ABSTRACT OF THEDISCLOSURE This is a division of application Ser. No. 533,044, filedMar. 9, 1966, now US. Patent No. 3,375,611.

This invention relates to removable sash window installations withself-locking automatically unlocking sash balances. Its objects are toprovide such an installation including a double-hung sash window frameand sash frame having an auxiliary frame portion adapted to removablyreceive a window screen and also optionally interchangeably receive ahurricane shutter in place of the screen; also to provide a resilientmounting device for the channel sash guides of such an installationwhich is of simple and inexpensive yet strong construction and which iseasily adjusted to provide adjustability of the sash guide channel; alsoto provide an improved and positively securing automatically lockingsash balance which operates by a wedging action without indenting orotherwise disfiguring its housing; and also to provide a window sashborder structure of hollow metallic or plastic construction, thecomponents of which are adapted to be produced by extrusion andinterchangeably receiving, in the side rails, adapter strips forconverting the removable sliding sash window into a removablesliding-andtilting sash window.

FIGURE 1 is a rear elevation on a reduced scale, of a removabledouble-hung sash window installation with an automatically locking sashbalance, according to the present invention;

FIGURE 2 is a vertical section upon an enlarged scale, taken along theline 22 in FIGURE 1;

FIGURE 3 is a central vertical section through a hurricane shutter whichis interchangeable with the screen shown in FIGURE 2;

FIGURE 4 is a fragmentary front elevation of the hurricane shutter shownin FIGURE 3;

FIGURE 5 is a horizontal section, upon an enlarged scale, taken alongthe line 55 in FIGURE 1; showing the improved window installation of theinvention with the upper sash in its lowered position so as to show itsrelationship to the lower sash;

FIGURE 6 is a fragmentary vertical section taken along the line 6-6 inFIGURE 5, showing one of the self-locking automatically releasing sashbalances according to the invention, in its unlocked position with thesash in place;

ed States Patent FIGURE 7 is a view similar to FIGURE 6, but with thesash removed and the sash balance self-locked;

Patented Oct. 21, 1969 FIGURE 8 is a vertical section, mainly in frontelevation, of the self-locking sash balance of FIGURES 6 and 7, takenalong the line 8-8 in FIGURE 6;

FIGURE 9 is a view similar to FIGURE 7, showing the self-locking sashbalance in side elevation;

FIGURE 10 is a vertical section, mainly in rear elevation of theself-locking sash balance on FIGURES 6 to 9, taken along the line 1010in FIGURE 9;

FIGURE 11 is a horizontal cross-section taken along the line 1111 inFIGURE 6, of the self-locking sash balance, removed from its housing;

FIGURE 12 is a vertical section through a simplified adjustableresilient sash guide mounting device, according to the invention, takenalong the line 1212 in FIGURE 5;

FIGURE 13 is a vertical section, mainly in front elevation, of theresilient mounting of FIGURE 12, taken along the line 1313 therein;

FIGURE 14 is a fragmentary horizontal section through a hollow compositewindow sash rail constituting a modification of that shown in FIGURE 5,together with a portion of its sash guide; and

FIGURE 15 is a horizontal section through an adapter strip forconverting the hollow sash rail of FIGURE 14 from a removable slidingsash window to a removable sliding-and-tilting sash window together witha portion of its sash guide.

GENERAL ARRANGEMENT Referring to the drawings in general, FIGURE 1 showsa self-locking automatically unlocking removable sash windowinstallation, generally designated 20, according to one form of thepresent invention as consisting generally of a window frame 22 ofmetallic or plastic construction adapted to slidably receive double-hungupper and lower sliding sashes 24 and 25, respectively. The window frame22 is adapted to be mounted in and secured to the adjacent buildingwindow opening frame, generally designated 26, which includes a buildingopening top member 28, building opening side members 30 and a buildingopening bottom member or sill supporting member 32 (FIGURE 2). Thewindow frame 22 consists of upper and lower or top and sill members 34and 36 fitting over their respective building structure members 28 and32, the latter of which are ordinarily of wood. The members 34 and 36(FIGURE 2) are interconnected by opposite window side frame members 38of similar construction secured to the building frame side members 30and adapted, in turn, to receive on one side a fixed sash guide 40 andon the other side a yieldingly mounted sash guide 42. The latter isresiliently supported upon springs 44 set into recesses 46 in theadjacent building structure side member 30. The position of theyieldable sash guide 42 is adjusted by means of resilient adjustablemounting devices, generally designated 30 (FIG- URES 5, 12 and 13)disposed at vertically spaced intervals along the adjacent verticalbuilding structural member 30 into which these are inserted in spacedholes 52 (FIGURE 12).

The weights of the upper and lower sashes 24 and 25 are balanced byself-locking automatically unlocking sash balances, generally designated54 (FIGURES 5 to 11, inclusive), operated by tripping devices, generallydesignated 36 (FIGURE 6), one of which is seated in each sash 24 or 26 ashort distance above the lower adjacent corner thereof. Each windowframe 34 removably and interchangeably receives a window screen,generally designated 58 (FIGURES 2 and 5), or a hurricane shutter 60(FIGURES 3 and 4) as described more fully below.

A modified two-piece sash side rail, generally designated 62 (FIGURE14), composed of interfitting parts 3 64 and 66 is adapted to besubstituted for the side sash rails shown in FIGURE 5 to slidably engagethe sash guides 40 and 42 for sidewise removal of the sashes 24 and 25.The outer member 66 is further adapted to receive an adapter strip 68(FIGURE 15) for conversion thereof into a sliding-and-tilting removablesash window construction having a camming action upon a flared channelyieldable sash guide 70. These constructions are described in detailbelow, under their respective headings.

The top member 34 of the window frame 22 (FIG- URE 2) includes outer andinner components 72 and 74 respectively interconnected by a lowercomponent 76. The outer component 72 includes a Vertical base portion 78of T-shaped cross section secured to the outer side of the window frameopening top member 28 and having a horizontal portion 80 recessed intothe lower outer portion of the member 28. The outer frame component 72additionally includes a downwardly facing channel extension 84consisting of an upper wall or horizontal Web portion 86 integral withand projecting outwardly from the vertical base portion 78, and alsoincludes a vertical outer wall 88 extending downwardly from the upperwall 86 and terminating in an inwardly extending flange portion 90spaced horizontally away from the base portion 78 and defining anelongated opening 92 leading into a chamber 94 and adapted tointerchangeably receive the screen 58 or hurricane shutter 60, asexplained more fully below.

The inner component 74 (FIGURE 2) likewise has-a vertical base portion96 of T-shaped cross section secured to the inner face of the windowframe opening top member 28 and having a horizontal portion 98 likewiserecessed into the lower rearward corner of the member 28 in a mannersimilar to that of the portion 80. Secured :as by fasteners 102 to theunderside of the window frame opening top member 28 are spacers 104(FIGURE 2) to the lower sides of which the lower component 76 issecured. The lower component 76 is flanged at its outer and inner edgesadjacent the bases 78 and 96 and near the outer spacers 104 is providedwith a downwardly extending hollow rib portion 106 of rectangularcross-section interfitting with the top of the upper sash 24 to providea weather seal, as described below.

The window frame side members 38 (FIGURE 5) likewise include outer andinner components 108 and 110, respectively. The individual components ofeach of the two pairs of outer and inner components 108 and 110 are ofsimilar but oppositely facing construction. Each outer component 108includes a vertical base portion 112 of T- shaped cross section securedto the outer face of each of the window opening side members 30 and aninwardly extending flange portion 114 recessed into the inner corneredge of the member 30. Projecting outwardly from each base portion 112is a perpendicular vertical wall 116 from which extend a parallelvertical wall 118 terminating in a rearward extending flange 120 (FIGURE5). From FIGURE 5 it will be seen that the screen 58 fits into the spacebetween the flanges 120 and the base portions 112 which extend towardone another past the flange portions 114. The outer components 110 arealso of T- shaped cross-section (FIGURE 5) with inwardly extendingflange portions 122 similarly recessed into the window opening framemembers 30 and, of course, secured thereto.

The window frame side members 38 at their lower ends abut the oppositeends of the window frame sill member or bottom member 36. The latter isof approximately channel cross-section (FIGURE 2) with a top wall 124forming the web of the channel and parallel downwardly extending outerand inner flange portions 126 and 128 respectively, these three portionsextending down over the window frame opening bottom or sill member 32and secured thereto. The top wall 124 has a horizontal inner portion 130:and a downwardly and outwardly sloping outer portion 132 separated fromone another by an upstanding hollow horizontal rib 133 of rectangularcrosssection which, as will be seen below, interfits with the bottom ofthe lower sash 25 to provide a weather seal. Projecting substantiallyhorizontally from the upper edge of the outer flange portion 126slightly below its junction with the slanting top wall portion 132 is ahollow sill extension or screen ledge 134 (FIGURE 2) also ofapproximately rectangular cross-section with an upper wall 136 meetingthe edge of the top wall portion 132 in a shoulder 138, and a verticalouter wall 140' extending downwardly from the upper wall 136 andterminating in an inwardly extending flange portion 142. The upper wall136 and shoulder 138 form a seat for the lower end of the screen 58 aswill be seen below.

Screen construction The screen 58 (FIGURE 2) includes an open-centeredrectangular border frame 144 composed of four hollow metallic or plasticframe components 146 of roughly rectangular cross-section. Each framecomponent 146 has parallel front and rear walls 148 and 150 respectivelyand parallel outer and inner peripheral walls 132 and 134 respectively,the members 146 being preferably formed by extrusion. The front wall 148adjacent the inner peripheral walls 154 is provided with an inwardlyprojecting rib 156 containing a groove 158 in which is secured the edgeportion of a mesh screen sheet 160, as by a suitable plastic or metallicfiller 162. The topmost component 146 of the screen 58 fits into theopening 92 of the channel extension 84 (FIGURE 2) while the lowermostcomponent 146 rests upon the upper wall 136 of the screen ledge 134against the shoulder 138 as a stop. The rear walls 150 of the side framecomponents 146 (FIGURE 5} are provided with inwardly extending ribs 164forming thickened portions which are drilled and threaded for thereception of screws 166 which are inserted through four olfset orZ-shaped rotatable clips or latches 168, the outer ends of which overlapthe base portions 112 and the inner ends of which engage the rearwardwalls 150 to removably lock the screen 58 in position.

Hurricane shutter construction The hurricane shutter 60 which isinterchangeable with the screen 58 (FIGURES 3 and 4) consists of anopencentered rectangular border frame 170 made up of four framecomponents 172 to which are secured as by fasteners 174 the borderflange portions 176 of a corrugated closure member, generally designated178, having approximately semicylindrical humps separated from oneanother by fiat portions 182. The corrugated closure member 178 isconveniently made of rolled sheet aluminum and the end openings of thehumps 180 are closed by sheet metal end walls 184 welded or otherwisesecured thereto so as to provide a weather-tight joint. From FIG- URES2, 3 and 5 it will be seen that when the clips 168 are either removed orswung to one side after loosening the screws 166, the screen 58 may beremoved by pushing its lower frame component 146 outward oil the ledgeportion 134 and sliding the upper component 146 downward through theopening 92 in the channel extension 84 (FIGURE 2). The uppermostcomponent 172 of the border frame 170 is then slid upward through theopening 92 and the lower one pulled inward over the ledge 134 intoengagement with the shoulder 138 and locked in position by clips (notshown) similar to the clips 168 secured to the border frame 170 andsimilarly engaging the base portions 112 (FIGURE 5). Thus, the windowsashes 24 and 25 are protected from being shattered by flying debris,such as branches, coconuts, and the like carried by hurricane winds. Thehurricane shutter 60 replaces the ordinary flat wood hurricane shutter:and is much more rapidly installed and removed, while the cylindricalhumps or corrugations 180 provide added structural strength and rigidityto resist deformation or penetration. The hurricane shutter 60 alsoreplaces metal awnings which do not provide adequate protection sincethey do not completely cover the window opening or the sash panes.

Sash construction The upper and lower sashes 24 and (FIGURES 1, 2 and 5)are of similar constructions, except for their meeting rails, hence,excepting the latter construction, a single description will sufiice forboth. Each sash 24 or 25 includes a meeting rail 190 or 192respectively, side rails 194 and a fourth or remaining rail 196 which isthe top rail of the upper sash 24 and the bottom rail of the lower sash25. Each of the rails 194 or 196 is of hollow approximately rectangularconstruction with parallel forward and rearward walls 198 and 200respectively (FIG- URE 2) interconnected by recessed outer and innerwalls 202 and 204, respectively. The outer wall 202 has a broader insetor channel portion 206 which mates with either of the downwardlyextending hollow rib portion 106 of the lower components 76 of the topmember 34 or with the upstanding hollow horizontal rib 133 of the sillmember 36, as the case may be (FIGURE 2), thereby providing a weatherseal, as previously stated. The inner wall 204 of each rail 194 or 196is provided with an inwardly extending narrow channel portion 208, andthe meeting rails 190 and 192 with similar channel portions 210 in whichthe edges of the panes 212 of the upper and lower sashes 24 and 25 areseated and seated in any conventional manner. While for purposes ofsimplicity FIG- URES 2 and 4 show single panes 212, it will be obviousthat the channels 208 may be broadened, like the channels 206, toreceive conventional double pane glazing (not shown) of the thermal typewell known to those skilled in the window glass industry.

The meeting rail 190 of the upper sash 24 has a narrow channel upperwall 214 (FIGURE 2) containing the pane-receiving channel portion 210,whereas the meeting rail 192 of the lower sash 25 has a similar lowerwall 216. The forward wall 213 of the upper sash meeting rail 190 andthe rearward wall 220 of the lower sash meeting rail 192 are flat andparallel as is the rearward wall 222 of the upper sash meeting rail 190.The bottom wall 224 thereof, however, and the top wall 226 of themeeting rail 192 have rearwardly and forwardly directed extensions 228and 230, respectively, spacing the rearward wall 222 of the rail 190away from the forward wall 232 of the meeting rail 192. The wall 232 andthe extension 230 have ribs 234 and 236, respectively, extending towardone another to define an elongated horizontal channel 238 with entranceflanges 234 and 236 receiving the base portion 240 of a resilientsealing strip 242 of natural or synthetic rubber or resilient syntheticplastic, the neck or narrowed portion of which extends between theopening or slot provided by the ribs or flanged portions 234 and 236.The sealing strip 242 resiliently engages the rear wall 222 of the uppersash meetting rail 190 to seal the gap or crack between the meetingrails 190 and 192 to prevent the entrance of wind and weather.

Sash guide construction The fixed and yieldingly mounted sash guides 40and 42 are of identical but oppositely facing construction and differonly in their mounting arrangements, hence a single description willsutfice for both. Each is conveniently made of aluminum by extrusion andconsists of a vertical base plate 244 (FIGURE 5) including two spacedsash balance spring casings 246 of rectangular cross-section, one forthe upper sash 24 and the other for the lower sash 25, and each having asidewall structure 243 with front and rear walls 245 and 247,respectively. Each spring casing 246 has a sash guide rib portion 248projecting beyond the base plate 244 for relative sliding matingengagement with the broader channel portions 206 of the sash side rails194, and also has an elongated vertical slot 250 in the front wall 147thereof. The fixed sash guide 40, as its name indicates, is fixedlysecured, as by suitable fasteners (not shown) to the window frameopening side member immediately adjacent it and, in the form of theinvention shown in FIGURE 5, the casings 246 do not contain balancingsprings but serve solely as guides for sliding engagement by the upperand lower sashes 24 and 25.

Resilient sash guide mounting construction The yieldingly mounted sashguide 42, as previously stated, is of identical construction to thefixed sash guide 40 (FIGURE 5) and is movably and resiliently mountedupon compression springs 44 adjusted by the mounting devices 50, andcontains balancing springs. For resiliently adjusting the movable sashguide 42, the adjacent window frame opening side member 30 is centrallybored and cupped at 254 at vertically spaced intervals to rotatablyreceive the beveled heads of adjusting screws 252 having annularenlarged portions 256 behind the cupped portions 254 to rotatably retainthe adjusting screws 252 in connection with the base portion 244 of thesash guide 42. Each screw 252 is threaded through a nut 258 locatedbehind the apertured front wall halves or mountive plate or face plate260 of a two-part housing 262. The housing 262 (FIGURES 12 and 13), hasoppositely facing housing valves 264 of rectangular cross-section withhalf-cupped portions 266 meeting one another along a parting plane 268(FIGURE 13).

Each housing half 264 has a rear wall portion 270 which serves as anabutment for one-half of the rearward end of a compression spring 272,the forward end of which engages the nut 258 and urges it against thefront wall halves 260. Since the nut 258 is rectangular and snugly fitsthe interior of the housing 262, it cannot rotate, hence the threadedshank of the adjusting screw 252 moves in or out as the latter isrotated within the front wall hole 274 by means of a screw driver. Thisaction, through the connection of the screw head with its cupped portion254 moves the sash guide 42 inward or outward as the case may be, whileyieldably supporting it upon the springs 44 and 272. As previouslystated, the resilient adjustable mounting devices 50 are mounted in thevertically-spaced holes 52 in the adjacent window frame opening sidemember 30, and their half member construction not only greatlysimplifies their manufacture and installation by means of U-nails ordouble pronged nails 276 (FIGURE 13).

The housings 262 are also conveniently manufactured by their halves 264being molded from synthetic plastic material, which considerably reducestheir cost as well as rendering them weather-proof. Resilient insulationstrips 278 of rectangular cross-section and of any suitableheat-insulating material, such as fibrous glass, are interposed betweenthe resiliently mounted sash guide 42 and the flange portions 114 and122 of the outer and inner components 108 and 110 (FIGURE 5). Theseinsulating strips 278 expand and contract as the sash guide 50 is movedinward or outward by rotating the adjusting screws 252 of theiradjustable resilient mounting devices 50.

Self-locking automatically unlocking sash balance construction Eachself-locking automatically unlocking sash balance 54 (FIGURES 5 to 11inclusive) is housed in one of the casings 246 of theresiliently-mounted sash guide 42, one for the upper sash 24 and theother for the lower sash 25. FIGURE 5 shows only the sash balance 54 forthe lower sash 25 since the other sash balance 54 for the upper sash 24is above the plane of section. Each sash balance 54 includes anelongated sash balancing spring 280 (FIGURES 6, 7 and 9), the loopedupper end of which (not shown) is hooked over the top of the casing 246of the sash guide 42. The lower end loop 282 of the sash balancingspring 280 is hooked through a hole 284 in an upstanding lug 286 in thetop of a sash balancing lock carrier 288 in the form of a block ofsynthetic plastic material, such as nylon, of rectangular cross-sectionsnugly but slidably fitting the interior of the casing 246. The

7 lock carrier 288 along its forward face 290 has a channel 292 (FIGURES7 and 11) terminating in a horizontal hole 294 below which is a lowerend wall 296.

Pivotally mounted within the hole 294 upon a pivot pin 298 mounted inthe lock carrier 288 is a bent lock operating lever 300, the outer arm302 of which passes through the slot 250 in the housing 246 into thepath of the tripping device 56 mounted on the upper or lower sash 24 or25, that shown in FIGURE 6 being on the lower sash 25. The upwardly bentinner arm 304 of the lever 300 (FIGURES 6 and 7) terminates in a roundedupper end which engages a contact surface 306 formed by the upper end ofa slot 308 in a vertically sliding sashlocking Wedge or locking member310, also preferably of synthetic plastic such as nylon. The lockingwedge 310 has an inclined rearward thrust surface 312 (FIGURES 7, 9 and11) which slidably engages a correspondingly oppositely inclinedabutment surface 314 forming the rearward side of a cutaway notch 316 inthe lock carrier 288. The side of the locking wedge 310 opposite theinclined surface 312 is roughened as at 318 to impart a maximumfrictional engagement between it and the rear wall of the housing 246 inthe locking position shown in FIGURE 7. The roughened surface 318 may beintegral with the locking wedge 310, such as by providing it with acriss-cross or knurled surface or such surface may be formed on aseparate sheet of material adhesively secured thereto, the formerconstruction being shown. The upper end of the Wedge 310 is engaged by acompression spring 320 (FIG- URE 6) seated in a socket 322 in the lockcarrier 288.

Extending into the path of the lock operating lever 300 is a trippinglever 324 (FIGURE 6) of the tripping device 56. The tripping lever 324is pivotally mounted upon a pivot pin 326. The forward arm of the lever324 has a flat or horizontal lower side 328 and a beveled upper side330, whereas the rearward arm of the tripping lever 324 is drilled toreceive the looped lower end of a tension spring 332, the hole beingmounted in a recess 334 in the sash 24 or 25 or, in actual practice, ina casing (not shown) inserted in the recess 334 and carrying theopposite ends of the pivot pin 326.

In the operation of the self-locking automatically unlocking sashbalance 54, let it be assumed that the sash 24 or 25 is in its insertedposition within the window frame 22 so as to slide vertically in thesash guides 40 and 42 (FIGURE and that the horizontal lower outer endsurface 328 of the tripping lever 324 is in engagement with the outerarm 302 of the lock-operating lever 300 (FIGURE 6). Under thesecircumstances, the weight of the sash 25 exerted upon the tripping lever324 pushes downward upon the forward end 302 of the lock-operating lever300, tilting it clockwise around its pivot pin 298 and causing its bentinner arm 304 to push upward against the contact surface 306 of the sashlocking wedge 310, pushing the latter upward and inward by the slidingengagement of its inclined thrust surface 312 with the inclined abutmentsurface 314 of the lock carrier 288. This action withdraws the roughenedrearward surface 318 of the locking wedge 310 from engagement with therear wall 245 of the casing 246 and the front surface 290 of the lockcarrier 288 from engagement with the front wall 247 thereof, therebyfreeing the lock 254 to be pulled upward by the sash balancing spring280 and thus balancing the weight of the sash 24 or 25.

If, now, the user desires to remove one of the sashes, for example thelower sash 25, he pushes sidewise to the left thereon, compressing thesprings 44 and 272 as he moves the sash guide 42 laterally until thechannel portion 206 of the opposite side rail 194 clears the guideportion 248 of the fixed sash guide 40, whereupon he swings the saidopposite side rail 194 horizontally toward himself out of the windowframe 22. He then moves the sash 25 obliquely outward in its own planeentirely out of the window frame.

In so doing, the instant the bottom surface 328 of the tripping lever324 slides off the forward arm 302 of the lock operating lever 300, thecompression spring 320 is able to push downward upon the locking wedge310 from the unlocked position of FIGURE 6 to the locked position ofFIGURE 7, jamming the roughened surface 318 thereof against the rearwall 245 of the casing 246, and its forward face 290 against the forwardwall 247. This action securely locks the lock carrier 288 and thereforethe sash balance lock 54 in its attained position, regardless of thetension existing in the balancing spring 280 and thus regardless of thelocation at which the sash 25 is removed.

If the sash 25 is replaced in the window frame 22 in such a positionthat the tripping lever 324 lies below the lock-operating lever 300, theraising of the sash 25 merely causes the downwardly inclined end surface330 of the tripping lever 324 to slide past the rounded outer end of theouter arm 302 of the lock-operating lever 300, tilting as it passes andsnapping "back into its position of FIG- URE 6 by the action of thetension spring 332. Then when the operator pushes downward upon the sash25 to engage the lower end surface 328 of the tripping lever 324 withthe upper surface of the forward arm 302 of the lock-operating lever300, it again tilts the latter around its pivot pin 298 so that the bentrearward arm 304 pushes the locking wedge 310 upward out of the lockedposition of FIGURE 7 into the unlocked position of FIG- URE 6, asbefore.

Modified composite sash rail In the modified composite sash rail 62 ofFIGURE 14. the interfitting parts 64 and 66 are produced by extrusionand joined to one another by opposite dovetail ribs 336 which areslidable into interfitting engagement with corresponding dovetailgrooves 338 formed in the internal enlargements 340 of the opposite sidewalls 342 of the component 64. The latter has a narrow internal channelportion 344 adapted to receive the window pane, as in the case of thechannel portions 208 of FIGURE 5. The component 66 has oppositely facingangle portions 346 extending outwardly from the base portion 348 thereof(FIGURE 14) and forming a channel groove 350 engaging the forwardlyprojecting guide portion 248 of the sash balance housing 246.

When the composite sash rail 62 is used for a sliding and tilting sashin contrast to the solely sliding sash employing the sash guides 40 and42 of FIGURE 5, the adapter strip 68 is employed. It consists of anelongated base portion 352 (FIGURE 15) which snugly fits the channelgroove 350 and which has an enlarged rib or guideway-engaging portion354 with a flat central surface 356 and inclined or obtusely oblique camsurfaces 358 on the portion 354 overhanging the base portion 352. Theinclined surfaces 358 and fiat central surface 356 slidably engagecorresponding inclined or flared outer surfaces 360 and central surface362 in the correspondingly-shaped sash guide 70.

In operation, when the sash equipped with the sash rail 62 and adapterstrip 68 is swung in the plane of the drawing, as by being pivoted aboveor below the plane of the drawing, one of the inclined cam surfaces 358slidably engages the adjacent inclined surface 360 and in so doingpushes the sash guide 70 laterally out of the way during the tiltingaction.

What I claim is:

1. A double-hung sliding-sash window construction, comprising a windowframe including metallic top, bottom and side members, sash guidesdisposed in said window frame in spaced parallel relationship adjacentsaid side members, double-hung sliding sashes slidably mounted in saidsash guides,

and resilient sash balances interconnecting said sashes and said sashguides,

each of said sashes including border frames and transparent panessecured in said frames,

each frame having hollow composite side rails including an outwardlyfacing channel element and a channel closure element disposed on theouter side of said channel element in interfitting closing relationshiptherewith,

said closure element having a sash-guideengaging portion on the outerside thereof slidably engaging one of said sash guides, one of saidelements having longitudinal grooves therein and the other elementhaving longitudinal ribs thereon disposed in rigidly interfittingengagement therewith.

2. A resiliently mounted window sash guide for a sliding sash window ina window frame, said sash guide comprising an elongated sash guidemember,

an elongated longitudinally divided plural-part hollow casing adapted tobe fixedly secured to the window frame and having spaced parallelopposite side walls,

a spring-pressed internally threaded polygonal nut disposed in saidcasing and having spaced parallel opposite side surfaces slidably andguidedly engaging said side walls in relative-rotation-preventingrelationship therewith,

and a screw element rotatably connected to said sash guide against axialmotion relatively thereto and threadedly engaging said internallythreaded nut.

3. A double-hung sliding-sash window construction, comprising a windowframe including metallic top, bottom and side members,

sash guides disposed in said window frame in spaced parallelrelationship adjacent said side members,

double-hung sliding sashes slidably mounted in said sash guides, andresilient sash balances interconnecting said sashes and said sashguides,

each of said sashes including border frames and transparent panessecured in said frames,

each frame having hollow composite side rails including an outwardlyfacing channel element and a channel closure element disposed on theouter side of said channel element in interfitting closing relationshiptherewith,

said closure element having a sash-guideengaging portion on the outerside thereof slidably engaging one of said sash guides, saidsash-guide-engaging portion comprising a groove, and a tilting sashadapter element having a base portion disposed in mating engagement withsaid groove and having a beveled cam portion connected to said baseportion.

References Cited UNITED STATES PATENTS 1,730,222 10/1929 Linn 49--16l X2,667,668 2/1954 Osten 49-418 2,718,035 9/1955 Schwerak 49-418 3,228,0681/1966 Trout 49417 3,335,523 8/1967 Isler et a1. 49-176 DAVID J.WILLIAMOWSKY, Primary Examiner I. KARL BELL, Assistant Examiner US. Cl.X.R.

